Lifobe of opbbatiwg mttl-saws



B. FRAZEE. MODE 0P OPERATING MILL SAWS.

5478872 from E5677? ice oa/-W I 0 Z of /a 55. V 027 Z Erma v i am z'Ze d/ v PATENTED OUT. 18 1853 "perspective view; Fig. 2, a detached por- BENJ. FRAZER 0F DURHAMVILLE, NEW YORK.

'MQDE 0h" @PEMTING: MILL-SAWS.

Specification of Letters Patent No.

To all whom it may concern:

Be it known. that l, BENJAMIN *lFnaznn, ot Durhamville, Uneida county, and State of New York, have invented an Improved Portable Muley-Sawrnill; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, forming a part ct this specification.

The nature of my invention consists in the advantageous simple and cheap manner or method of attaching the saw blade to the main shait, by which, a reciprocating movement is imparted to the saw in such a manner that the saw will draw into the log on its downward movement and draw out from the log and clear itself on its upward movement. The whole machine being construct: ed without the usual incumbrances of sash, pitman, carriage, geared or cogged pinions, enables it to be constructed cheaper than other mills and by persons possessing little mechanical skill; and there being but few bearings about it there will be comparatively little friction and the wear and tear will ofcourse be proportionately decreased.

Figure l, of said drawing, represents a tion showing the connection of the saw with the main shaft, in each of which figures like parts are designated by the same letters of reference.

a, a, the horizontal sills of the main frame supported in any well known manner; b, b, the stanchions connected by the cross tie c, forming the frame for sustaining the upper end of the saw blade; a the main shaft which receives its motion from any prime mover by the band connection 6; f, f, the two headblocks which are not attached to a carriage in the usual manner but are connected together by the endless chains g, g, which pass over pulleys h,h, on horii shal'ts at each end of the frame EttLu have one turn around the pulleys on the feeding shaftwhich is operated by the ratchet wheel and hand or pawl, connected with the main shaft by an eccentric or as in the usual manner. Thus by this simple arran "ement ot the head blocks with the feed shaft through the intervention of the endless chains the log is sustained, ted tothe saw, and run back, in a very desirable manner. The saw j is adjusted in the trame in the usual manner of saws without a sash which is called the .rnuley arrangement. It is connected diraise, dated @ctober is, teas.

rectly with the main shaft in a peculiar mannenby which a more desirable movement is given to it (which is not the usual rectilinear movement) without the use of a pitinan and in such a manner as to clear.

itself in a perfect manner when on its upper movement and to" act more efi'ectually upon the log when on its downward movement.

is, is a lever tulcrumed at Z havingaslot cut in its-other end-which slot works over the wrist or crank pin a of the balance wheel of the main or driving shatt, and the lower end of the saw blade is connected with this lever at m, so that, when the balance wheel is put in motion reciprocating movement is communicated to the saw blade.

The lever Z2 is adjustable on-its fulcrum and it must be so adjusted as when. the is at the end of its downward strckeit must assume a horizontal position, so that, when it carries the saw upward, the saw will be drawn out and when it carries the saw downward the saw will be drawn in, thus causing the saw not to reciprocate in a straight line but in such a manner as to cause it to clear itself when on the upward stroke and draw into the action of the log or timber when on its downward or cutting.

stroke. By this simple arrangement the necessity of adjusting the saw sash out of a right angle with the plane of the timber to be cut so as to enable the saw to clear itselt on its upward stroke and act edectually upon the timber on its downward stroke is obviated.

l have a modification oi the arrangement for connecting" the saw directly to the driving shaft, which is difiterent trohi that above described but as it is described in a caveat which I have filed in the Patent @li'ice ll deem it unnecessary to describe it here.

Having thus fully described the nature of my invention what it claim therein as new i and, desire to secure by Letters Patent is,

Attaching" a reciprocating saw blade to the, 'ina-in shaft, by means of a slotted lever" and crank pin, operating in the manner and fur the purposes hereinbetore substantially set forth.

in testimony whereoi' l have hereunto signed my name before two subscribing witnesses.

BENJAMIN Witnesses:

H. H. Youne,

"l. S. SMITH.

Mid 

